Volume 6, Issue 6
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



The malarial infectivity of an African village community with particular reference to has been tested by selecting subjects at random, irrespective of their blood picture, and feeding batches of laboratory-bred on them. The degree of infectiousness has been judged by the number and identity of oöcysts found in the stomach of the engorged mosquitoes after varying periods of incubation.

Random tests on 347 subjects of all ages indicate that for every 100 individuals in the African village population of average age composition there are at any one time about 10 or 11 individuals capable of infecting mosquitoes with malaria parasites, mainly . All age groups contribute to this infective reservoir, the actual numbers observed being 4.2 infants and toddlers (under 5 years), 3.0 school children (5 to 14 years) and 3.3 adolescents and adults (15 years and over). Most of the infections picked up in this random survey had a low infectivity to mosquitoes. There is no indication that unusually high infectivity is necessarily associated with the lower age groups. It is considered that under these conditions of “hyperendemic” malaria, adolescents and adults form at least 30 per cent of the total reservoir of malaria infection in the human population.


Article metrics loading...

The graphs shown below represent data from March 2017
Loading full text...

Full text loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error